Hi all,
For who's interested in radio interferometry:
I recently published new domain: openvlbi.com
Here you can use a free crosscorrelator, by adding fits files compatible with the INDI FITS standard.
You can use an RTLSDR receiver or upload FITS files with low-samplerate observations, and the website will plot the correlations.
It's still at beta stage, and intensity interferometry only.